Problem: Linux systems often break the network, the system returned to normal after the restart

The system suddenly broke off the net, in the Messge log to see:
June 14:23:52 localhost Kernel:WARNING:at net/sched/sch_generic.c:265 dev_watchdog+0x26b/0x280 (not tainted)
June 14:23:52 localhost Kernel:hardware name:x9scl/x9scm
June 14:23:52 localhost Kernel:netdev watchdog:eth1 (e1000e): Transmit Queue 0 timed out
June 14:23:52 localhost kernel:modules linked in:fuse ip6table_filter ip6_tables ebtable_nat ebtables ipt_reject Xt_CH Ecksum 8021q garp cpufreq_ondemand acpi_cpufreq freq_table Mperf Bridge STP LLC IPv6 vhost_net macvtap Macvlan Tun Kvm_int El KVM ipmi_si ipmi_msghandler microcode itco_wdt itco_vendor_support sg joydev serio_raw i2c_i801 i2c_core Lpc_ich Mfd_co Re shpchp e1000e PTP pps_core ext4 jbd2 mbcache sd_mod crc_t10dif ahci video output dm_mirror dm_region_hash dm_log dm_mod [Last Unloaded:nf_conntrack]
June 14:23:52 localhost kernel:pid:0, comm:swapper not tainted 2.6.32-642.el6.x86_64 #1
June 14:23:52 localhost Kernel:call Trace:
June 14:23:52 localhost kernel: <IRQ> [<ffffffff8107c911>]? Warn_slowpath_common+0x91/0xe0
June 14:23:52 localhost kernel: [<ffffffff8107ca16>]? warn_slowpath_fmt+0x46/0x60
June 14:23:52 localhost kernel: [<ffffffff8149a99b>]? dev_watchdog+0x26b/0x280
June 14:23:52 localhost kernel: [<ffffffff8106864c>]? Scheduler_tick+0xdc/0x2b0
June 14:23:52 localhost kernel: [<ffffffff8149a730>]? dev_watchdog+0x0/0x280
June 14:23:52 localhost kernel: [<ffffffff8108fb27>]? run_timer_softirq+0x197/0x340
June 14:23:52 localhost kernel: [<ffffffff8108f386>]? Update_process_times+0x76/0x90
June 14:23:52 localhost kernel: [<ffffffff81085495>]? __do_softirq+0xe5/0x230
June 14:23:52 localhost kernel: [<ffffffff8100c38c>]? call_softirq+0x1c/0x30
June 14:23:52 localhost kernel: [<ffffffff8100fca5>]? Do_softirq+0x65/0xa0
June 14:23:52 localhost kernel: [<ffffffff81085325>]? Irq_exit+0x85/0x90
June 14:23:52 localhost kernel: [<ffffffff8155185a>]? smp_apic_timer_interrupt+0x4a/0x60
June 14:23:52 localhost kernel: [<ffffffff8100bc13>]? apic_timer_interrupt+0x13/0x20
June 14:23:52 localhost kernel: <EOI> [<ffffffff812facfe>]? Intel_idle+0xfe/0x1b0
June 14:23:52 localhost kernel: [<ffffffff812face1>]? Intel_idle+0xe1/0x1b0
June 14:23:52 localhost kernel: [<ffffffff81014ac9>]? sched_clock+0x9/0x10
June 14:23:52 localhost kernel: [<ffffffff810adfcd>]? sched_clock_cpu+0xcd/0x110
June 14:23:52 localhost kernel: [<ffffffff8144093a>]? Cpuidle_idle_call+0x7a/0xe0
June 14:23:52 localhost kernel: [<ffffffff81009fe6>]? cpu_idle+0xb6/0x110
June 14:23:52 localhost kernel: [<ffffffff81540ab9>]? start_secondary+0x2c0/0x316
June 14:23:52 localhost kernel:---[end trace 604aa4cd80c5efdb]---
June 14:23:52 localhost kernel:e1000e 0000:02:00.0:eth1:reset adapter unexpectedly
June 14:23:52 localhost Kernel:br1:port 1 (eth1) entering disabled state
June 14:23:52 localhost networkmanager[2281]: <info> (eth1): Carrier now OFF (device State 3)
June 14:23:52 localhost networkmanager[2281]: <info> (eth1): Device State change:disconnected-unavailable ( Reason ' carrier-chagned ') [3 2 40]
June 14:23:52 localhost networkmanager[2281]: <info> (eth1): Deactivating device (reason ' carrier-chagned ') [40]
June 14:23:52 localhost kernel:e1000e 0000:02:00.0:eth1:timesync Tx Control Register not set as expected

through the Internet search, found that the network card driver has a problem, the online solution is to update the network card driver. Since the NIC driver is not tested in person, this issue can be resolved by updating the system with "Yum-y update".

Viewing the system version
[Email protected] ~]# uname-a
Linux localhost.localdomain 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 03:15:09 UTC x86_64 x86_64 x86_64 gnu/linux
[Email protected] ~]# cat/proc/version
Linux version 2.6.32-431.el6.x86_64 ([email protected]) (GCC version 4.4.7 20120313 (Red Hat 4.4.7-4) (gcc)) #1 SMP Fri N OV 03:15:09 UTC 2013
[Email protected] ~]# lsb_release-a
LSB Version:: base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64: Graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch
Distributor Id:centos
Description:centos Release 6.5 (Final)
release:6.5
Codename:final
View Network card Drivers
[Email protected] ~]# Modinfo bnx2
FileName:/lib/modules/2.6.32-431.el6.x86_64/kernel/drivers/net/bnx2.ko
Firmware:bnx2/bnx2-rv2p-09ax-6.0.17.fw
Firmware:bnx2/bnx2-rv2p-09-6.0.17.fw
Firmware:bnx2/bnx2-mips-09-6.2.1b.fw
Firmware:bnx2/bnx2-rv2p-06-6.0.15.fw
Firmware:bnx2/bnx2-mips-06-6.2.3.fw
version:2.2.3
License:gpl
description:broadcom NetXtreme II bcm5706/5708/5709/5716 Driver
Author:michael Chan <[email protected]>
Srcversion:17d4a614d14049c677860ec
Alias:pci:v000014E4d0000163CsvSDBcSCI
ALIAS:PCI:V000014E4D0000163BSVSdBCScI
Alias:pci:v000014E4d0000163AsvSDBcSCI
ALIAS:PCI:V000014E4D00001639SVSdBCScI
Alias:pci:v000014E4d000016ACsvSDBcSCI
ALIAS:PCI:V000014E4D000016AASVSdBCScI
Alias:pci:v000014E4d000016AAsv0000103Csd00003102bcSCI
ALIAS:PCI:V000014E4D0000164CSVSdBCScI
Alias:pci:v000014E4d0000164AsvSDBcSCI
ALIAS:PCI:V000014E4D0000164ASV0000103CSD00003106BCScI
Alias:pci:v000014E4d0000164Asv0000103Csd00003101bcSCi*
Depends
vermagic:2.6.32-431.el6.x86_64 SMP mod_unload modversions
Parm:disable_msi:Disable Message signaled Interrupt (MSI) (int)
Yum Update system Updates
Yum-y Update
Centos6.5 update e1000 NIC driver Centos6.5 update e1000 NIC driver

Reboot
View System version view NIC driver
[Email protected] ~]# Modinfo bnx2
FileName:/lib/modules/2.6.32-642.el6.x86_64/kernel/drivers/net/bnx2.ko
Firmware:bnx2/bnx2-rv2p-09ax-6.0.17.fw
Firmware:bnx2/bnx2-rv2p-09-6.0.17.fw
Firmware:bnx2/bnx2-mips-09-6.2.1b.fw
Firmware:bnx2/bnx2-rv2p-06-6.0.15.fw
Firmware:bnx2/bnx2-mips-06-6.2.3.fw
version:2.2.6
License:gpl
Description:qlogic bcm5706/5708/5709/5716 Driver
Author:michael Chan <[email protected]>
Srcversion:16ba5fa9f22b085c53076ec
Alias:pci:v000014E4d0000163CsvSDBcSCI
ALIAS:PCI:V000014E4D0000163BSVSdBCScI
Alias:pci:v000014E4d0000163AsvSDBcSCI
ALIAS:PCI:V000014E4D00001639SVSdBCScI
Alias:pci:v000014E4d000016ACsvSDBcSCI
ALIAS:PCI:V000014E4D000016AASVSdBCScI
Alias:pci:v000014E4d000016AAsv0000103Csd00003102bcSCI
ALIAS:PCI:V000014E4D0000164CSVSdBCScI
Alias:pci:v000014E4d0000164AsvSDBcSCI
ALIAS:PCI:V000014E4D0000164ASV0000103CSD00003106BCScI
Alias:pci:v000014E4d0000164Asv0000103Csd00003101bcSCi*
Depends
vermagic:2.6.32-642.el6.x86_64 SMP mod_unload modversions
Parm:disable_msi:Disable Message signaled Interrupt (MSI) (int)
System updated, network card is also updated, the following is to see if the System network card is normal

Problem: Linux systems often break the network, the system returned to normal after the restart